Excavating tool having hard-facing elements

Abstract

An excavating tool having hard-faced elements supported in the material engaging surface thereof, the elements having generally planar faces disposed at an angle to the ground engaging surface.

We claim: 
     
       1. In a tool for excavating, a unitary metal member having a material engaging edge at one end and a mounting means spaced from said one end, said member having a generally planar material engaging surface extending generally from said one end, and a plurality of wear resistant elements mounted in said surface, the improvement characterized by the fact that each element has a generally planar outer face disposed at an angle to said surface, the outer face of each wear element being intersected by the plane of said surface, each element being of a uniform thickness in the direction measured perpendicular to said face, said face being generally perpendicular to the average line of force of material being engaged by said tool, said tool being equipped with an integral shoulder upstanding from said surface for each element. 
     
     
       2. In a tool for excavating, a unitary metal member having a material engaging edge at one end and a mounting means spaced from said one end, said member having a generally planar material engaging surface extending generally from said one end, and a plurality of wear resistant elements mounted in said surface, the improvement characterized by the fact that each element has a generally planar outer face disposed at an angle to said surface, said tool surface having side edges extending perpendicularly away from said engaging edge, the faces of elements adjacent one side edge being inclined toward said one side edge, the faces of elements adjacent the other side edge being inclined toward said other side edge. 
     
     
       3. In a tool for excavating, a unitary metal member having a material engaging edge at one end and a mounting means spaced from said one end, said member having a generally planar material engaging surface extending generally from said one end, and a plurality of wear resistant elements mounted in said surface, the improvement characterized by the fact that each element has a generally planar outer face disposed at an angle to said surface, said tool being equipped with an additional generally planar, material-engaging surface extending between said engaging edge and the first mentioned surface, said additional surface being inclined to said first mentioned surface at about the same angle as said element faces, said additional surface having a plurality of depressions therein, a wear-resistant element in each of said depressions, each of said additional surface elements having an outer surface disposed generally flush with said additional surface. 
     
     
       4. A point for an excavating tooth comprising a generally wedge-shaped metal member having a material engaging edge at one end and a mounting means at the other end, said member having a pair of generally planar surfaces diverging from said edge to define a wedge shape, a plurality of wear-resistant elements in one of said surfaces, each element having a generally planar face and a uniform thickness measured perpendicular to said face, said faces being intersected by the plane of said one surface, said faces being inclined rearwardly relative to said one surface and at an angle of about 30° to about 75° relative to the mid-plane between said wedge surfaces.